Positron scattering from interstellar phosphorus-bearing compounds.

This article reports an investigation of positron impact scattering from several phosphorus-bearing compounds detected in the interstellar medium. The targets studied are HCP, CCP, CP, PN, and PO. For our theoretical model, we employed the spherical complex optical potential (SCOP) and complex scattering potential - ionization contribution (CSP-ic) methods.

Positron scattering from structurally related biomolecules.

We report the integral elastic, momentum transfer, and inelastic (positronium formation and ionisation) cross sections for positron scattering from structurally related molecules. The molecules chosen for the current investigation are formamide, formylphosphine, formic acid, -methylformamide, acetone, acetic acid, and formaldehyde. The cross sections were calculated using the optical potential approach and the complex scattering potential-ionisation contribution method for impact energies between 1 and 5 keV.

Study of Electron Collisions with Isoprene, 1,2-Butadiene, and Their Isomers.

Isoprene, 1,2-butadiene, and their isomers play an important role in aerosols in the atmosphere, interstellar media, and extraterrestrial life. Since electrons are everywhere, studying how electrons interact with these molecules is an important part of studying such environments. To date, however, little investigation has been conducted in this area.

Mean Free Paths and Cross Sections for Electron Scattering from Liquid Water.

Electron collision with liquid water is theoretically investigated and reported in this article. The range of projectile energy considered is 10-5000 eV, covering all major channels, viz., ionization, inelastic, elastic, and total scattering.

Electron Scattering Cross Sections for Anthracene and Pyrene.

UK molecular R-matrix calculations have been carried out for electron scattering from anthracene and pyrene. These molecules belong to the family of polycyclic hydrocarbons (PAHs) and are found in a nebula known as the Red Rectangle. Static exchange (SE), static exchange plus polarization (SEP), and close coupling (CC) approximations are used for scattering calculations.

Positron Scattering from Pyridine and Pyrimidine.

Positron impact scattering cross-sections for pyridine and pyrimidine are reported here. Spherical complex optical potential formalism is used to calculate the positronium formation, elastic, total, and differential cross-sections. The ionization cross-sections calculated here are obtained employing the complex scattering potential-ionization contribution method.

Low-Energy Electron Scattering from Dimethyl Ether.

Low-energy (0.1 to 15 eV) R-matrix calculation is performed for dimethyl ether molecule. Electronic excitation and momentum transfer cross section for low energies are reported for the first time.

Effects of amine fluoride and probiotic mouthwash on levels of in orthodontic patients: A randomized controlled trial.

Introduction: is one among the major etiological agent in periodontal diseases and has been proved to cause gingival inflammation under orthodontic appliances.

Aim: To assess the effect of amine fluoride and probiotic mouthwashes on levels of during orthodontic treatment, using real time-polymerase chain reaction (RT-PCR).

Materials And Methods: A randomised controlled trial was performed including 45 patients.

Total ionization cross section of cyclic organic molecules.

Two independent methods, namely, Binary-encounter Bethe (BEB) and complex scattering potential-ionization contribution (CSP-ic) methods, are employed to calculate the total ionization cross section (Q) for cyclic organic molecules from ionization threshold to 5 keV for which there is a paucity of data in the literature. The Q calculated with the (BEB/ωB97X) combination is found to give good agreement with the experimental results, the CSP-ic method, and the Q calculated from Irikura orbital energies. The Q for most of the targets are calculated for the first time over such a wide energy range.

Association of Undernutrition and Early Childhood Dental Caries.

Objective: To determine the association between early childhood caries and nutritional status in preschool children.

Methods: Cross-sectional study among preschool children (N=550, age 8-60 mo) were selected in tribal, rural and urban health care units of Kerala. An oral examination for early childhood caries status was done using Deft index.

Positron Scattering from Methyl Halides.

The well-known spherical complex optical potential (SCOP) and complex scattering potential-ionization contribution (CSP-ic) methods with appropriate modifications are applied to the CHX (X = F, Cl, Br, and I) molecules to compute positron scattering cross sections, which rather is the first theoretical attempt to report the same. Besides, various inelastic cross sections are also predicted for the first time in this Article. We have utilized the multiscattering spherical complex optical potential (MSCOP) approach to derive these cross sections.

Career Satisfaction Among Dental Public Health Specialists in India - A Cross-sectional Survey.

Introduction: The satisfaction in career is an important indicator for the growth of the discipline and the profession. An empirical investigation of satisfaction in career and amendments needed in course and profession may help in growth of discipline.

Aim: To assess career satisfaction among Dental Public Health (DPH) specialists working in India and analyze their perspective on changes required in the profession.

Calculation of total and ionization cross sections for electron scattering by primary benzene compounds.

The total and ionization cross sections for electron scattering by benzene, halobenzenes, toluene, aniline, and phenol are reported over a wide energy domain. The multi-scattering centre spherical complex optical potential method has been employed to find the total elastic and inelastic cross sections. The total ionization cross section is estimated from total inelastic cross section using the complex scattering potential-ionization contribution method.

Theoretical Formalism To Estimate the Positron Scattering Cross Section.

A theoretical formalism is introduced in this article to calculate the total cross sections for positron scattering. This method incorporates positron-target interaction in the spherical complex optical potential formalism. The study of positron collision has been quite subtle until now.

Electron impact ionization of cycloalkanes, aldehydes, and ketones.

The theoretical calculations of electron impact total ionization cross section for cycloalkane, aldehyde, and ketone group molecules are undertaken from ionization threshold to 2 keV. The present calculations are based on the spherical complex optical potential formalism and complex scattering potential ionization contribution method. The results of most of the targets studied compare fairly well with the recent measurements, wherever available and the cross sections for many targets are predicted for the first time.

Electron impact total cross section for acetylene over an extensive range of impact energies (1 eV-5000 eV).

Comprehensive study on electron impact for acetylene molecule is performed in terms of eigenphase diagram, electronic excitation cross sections as well as total cross section calculations from 1 eV to 5000 eV in this article. Computation of cross section over such a wide range of energy is reported for the first time. We have employed two distinct formalisms to derive cross sections in these impact energies.